virtual.md

# Establish a virtual environment in local

1. Install virtualenv

```bash
pip3 install virtualenv virtualenvwrapper
```

2. Modify your '.bashrc'

```bash
vim .bashrc
```

- Virtualenvwrapper settings:

```bash
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_VIRTUALENV=$HOME/.local/bin/virtualenv
source ~/.local/bin/virtualenvwrapper.sh
```

3. Check your modifications

```bash
ll .virtualenvs/
echo $WORKON_HOME
```

4. Create a new environment and copy the created envo to create a similar one

```bash
mkvirtualenv jupyter --python=python3
cpvirtualenv jupyter ase

workon jupyter

pip install sympy
pip install numpy
pip install matplotlib
pip install scipy
pip install jupyterlab
```

5. Deactivate the environment

```bash
deactivate
```

6. Remove the environment

```bash
rmvirtualenv juypter
```

- important other python lines

```python
import numpy
print(numpy.__version__)
print(matplotlib.__version__)
```